{
  "manageEntity": {
    "action": "Save",
    "entityId": "166736417",
    "entityType": "Track",
    "nonce": "0x13ee1b173851bad25e9f336a5d75dc7bdea6fff4cff0c385d5f3d07bbaa9e717",
    "signature": "0x3a7f76e189d32b9fe01819196172a05e4b79a445ef4309db22f1cfbd7738e29679c6040fafed11313e1b06e6e676bdb2bd1f38db17b64f4bfd2b3d71c50ac3c11c",
    "signer": "0xf368FaC32c516b93Fc22d224d1b4C93fd4BcA0C2",
    "userId": "643"
  }
}