{
  "manageEntity": {
    "action": "Save",
    "entityId": "580386492",
    "entityType": "Track",
    "nonce": "0xc2f29e9e5926bf1f16921beaf043925c9adadd51206e5a958e1b8351c11811f6",
    "signature": "0xb643abf671fef81ba326384c1069f51023150e64ccd6d7fbcf94271d099549475ffdf3aea635b44effb377ebaf806fe5b97b32f582f72521683412cdbb94dead1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}