{
  "manageEntity": {
    "action": "Save",
    "entityId": "1265384104",
    "entityType": "Track",
    "nonce": "0x7f8d5cba3aef6186bd3d5ce3ea884f8d87bcac2f5d90b4911bd05cb98db30191",
    "signature": "0x797ee2c3f5342c37123723bb03fbeafcdf27b486398ffead5f48d2c17eaf85511f33461857c11893af09f4cbf89da61063cbf1a95b404fedec511976619f737b1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}