{
  "manageEntity": {
    "action": "Save",
    "entityId": "134302967",
    "entityType": "Track",
    "nonce": "0x73c96a5b345f35eb81e8ab5864c9023b9b31e85d30a991e6a638f2b2e717ac88",
    "signature": "0xd363690686ac46fda55b8a2c2c487480684e6b03e4dedb9b033b781e667cc0ff492359ce0cd0884f397e72513bd3172d5a36f63f492fb8d002c46e00cc6c59471c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}